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Because of the zombie state, proxies have a skewed vision of the state of listeners, which explains why there are hacks switching the state from ZOMBIE to INIT in the proxy cleaning loop. This is particularly complicated and not needed, as all the information is now available in the protocol list and the fdtab. What we do here instead is to first close all active listeners or receivers by protocol and clean their protocol parts. Then we scan the fdtab to get rid of remaining ones that were necessarily in INIT state after a previous invocation of delete_listener(). From this point, we know the listeners are cleaned, the can safely be freed by scanning the proxies.
The HAProxy documentation has been split into a number of different files for ease of use. Please refer to the following files depending on what you're looking for : - INSTALL for instructions on how to build and install HAProxy - BRANCHES to understand the project's life cycle and what version to use - LICENSE for the project's license - CONTRIBUTING for the process to follow to submit contributions The more detailed documentation is located into the doc/ directory : - doc/intro.txt for a quick introduction on HAProxy - doc/configuration.txt for the configuration's reference manual - doc/lua.txt for the Lua's reference manual - doc/SPOE.txt for how to use the SPOE engine - doc/network-namespaces.txt for how to use network namespaces under Linux - doc/management.txt for the management guide - doc/regression-testing.txt for how to use the regression testing suite - doc/peers.txt for the peers protocol reference - doc/coding-style.txt for how to adopt HAProxy's coding style - doc/internals for developer-specific documentation (not all up to date)